Roasting – Preventing Warping When Roasting at High Temperatures

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I like to roast in a gas oven at 400F for extended periods. Ex: I will cook large batches of bacon at 400F for about 35 min, and large batches of Brussels Sprouts at 400F for 60+ min (with stirring). I have a large, gas convection oven.

A challenge I experience is my pans warping. This can cause them to suddenly deform in the oven, flinging food out of the pans and causing burns in the oven.

I recently got a set of 18-gauge stainless steel baking sheets, an upgrade from a thinner, cheaper set I had before. These have helped some, but I still experience warping. My questions:

  1. Would aluminum be better than stainless steel for purposes of preventing warping?
  2. Is the use of metal inevitably going to risk warping? (i.e. do I just need to give up and switch to glass or something?).
  3. Do I just need an even higher gauge (e.g. maybe 10?). (note: I like to use baking sheets that are at least 20in x 14in, and it's hard to find sheets this large at gauges higher than 18).
  4. Am I somehow missing something else entirely?

I've read that having fewer raised edges can reduce warping. But, I really need the pans I use to have all four edges raised about an inch.

Best Answer

12-gauge baking pans are easy to find, and not that expensive - you just have to look in the stores that sell to professional cooks. Search for "12 gauge sheet pan" and you'll get plenty of results. Just make sure that you check the size: a full-size sheet pan (18"x26") won't fit in most household ovens.